What’s the deal with 10k in miles for each Delta Amex referral?

American Express Delta SkyMiles cardmembers usually earn bonus miles for referring your friends, but it’s doubled right now, so you get 10,000 bonus SkyMiles for each approved referral rather than 5,000. The offer page also states that the referred friends will receive an elevated welcome bonus, though the actual amount isn’t stipulated.

Cardmembers with one of the following personal or business SkyMiles cards can earn 10,000 bonus miles per referral (up to 55,000 miles annually) through February 1st, 2017:

What else do I need to know about the 10k in miles for each Delta Amex referral deal?

Your referred friends may not receive the referral email if they have previously opted out of receiving email marketing communications from American Express.

You need to submit your referral by February 1st, 2017, but the referred individual must apply online through the emailed link and be approved by the same date in order to receive your bonus, so it’s wise to refer friends as soon as possible.

Allow 6 to 8 weeks for the bonus miles to post to your account after each referred individual is approved for the card.